-.5x^2+25x-105=0

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Solution for -.5x^2+25x-105=0 equation:


Simplifying
-0.5x2 + 25x + -105 = 0

Reorder the terms:
-105 + 25x + -0.5x2 = 0

Solving
-105 + 25x + -0.5x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-0.5 the coefficient of the squared term: 

Divide each side by '-0.5'.
210 + -50x + x2 = 0

Move the constant term to the right:

Add '-210' to each side of the equation.
210 + -50x + -210 + x2 = 0 + -210

Reorder the terms:
210 + -210 + -50x + x2 = 0 + -210

Combine like terms: 210 + -210 = 0
0 + -50x + x2 = 0 + -210
-50x + x2 = 0 + -210

Combine like terms: 0 + -210 = -210
-50x + x2 = -210

The x term is -50x.  Take half its coefficient (-25).
Square it (625) and add it to both sides.

Add '625' to each side of the equation.
-50x + 625 + x2 = -210 + 625

Reorder the terms:
625 + -50x + x2 = -210 + 625

Combine like terms: -210 + 625 = 415
625 + -50x + x2 = 415

Factor a perfect square on the left side:
(x + -25)(x + -25) = 415

Calculate the square root of the right side: 20.371548787

Break this problem into two subproblems by setting 
(x + -25) equal to 20.371548787 and -20.371548787.

Subproblem 1

x + -25 = 20.371548787 Simplifying x + -25 = 20.371548787 Reorder the terms: -25 + x = 20.371548787 Solving -25 + x = 20.371548787 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '25' to each side of the equation. -25 + 25 + x = 20.371548787 + 25 Combine like terms: -25 + 25 = 0 0 + x = 20.371548787 + 25 x = 20.371548787 + 25 Combine like terms: 20.371548787 + 25 = 45.371548787 x = 45.371548787 Simplifying x = 45.371548787

Subproblem 2

x + -25 = -20.371548787 Simplifying x + -25 = -20.371548787 Reorder the terms: -25 + x = -20.371548787 Solving -25 + x = -20.371548787 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '25' to each side of the equation. -25 + 25 + x = -20.371548787 + 25 Combine like terms: -25 + 25 = 0 0 + x = -20.371548787 + 25 x = -20.371548787 + 25 Combine like terms: -20.371548787 + 25 = 4.628451213 x = 4.628451213 Simplifying x = 4.628451213

Solution

The solution to the problem is based on the solutions from the subproblems. x = {45.371548787, 4.628451213}

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